From 9079ab7cb6768fa04e086303f90be043b423cca4 Mon Sep 17 00:00:00 2001 From: Steffen Prohaska Date: Sun, 21 Sep 2014 12:03:26 +0200 Subject: [PATCH] sha1_file: don't convert off_t to size_t too early to avoid potential die() xsize_t() checks if an off_t argument can be safely converted to a size_t return value. If the check is executed too early, it could fail for large files on 32-bit architectures even if the size_t code path is not taken. Other paths might be able to handle the large file. Specifically, index_stream_convert_blob() is able to handle a large file if a filter is configured that returns a small result. Signed-off-by: Steffen Prohaska Signed-off-by: Junio C Hamano --- sha1_file.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/sha1_file.c b/sha1_file.c index 423ec64e8..7b2612f73 100644 --- a/sha1_file.c +++ b/sha1_file.c @@ -3178,17 +3178,22 @@ int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags) { int ret; - size_t size = xsize_t(st->st_size); + /* + * Call xsize_t() only when needed to avoid potentially unnecessary + * die() for large files. + */ if (type == OBJ_BLOB && path && would_convert_to_git_filter_fd(path)) ret = index_stream_convert_blob(sha1, fd, path, flags); else if (!S_ISREG(st->st_mode)) ret = index_pipe(sha1, fd, type, path, flags); - else if (size <= big_file_threshold || type != OBJ_BLOB || + else if (st->st_size <= big_file_threshold || type != OBJ_BLOB || (path && would_convert_to_git(path))) - ret = index_core(sha1, fd, size, type, path, flags); + ret = index_core(sha1, fd, xsize_t(st->st_size), type, path, + flags); else - ret = index_stream(sha1, fd, size, type, path, flags); + ret = index_stream(sha1, fd, xsize_t(st->st_size), type, path, + flags); close(fd); return ret; } -- 2.11.0